Baldwin DRS-4-4-1000

The Baldwin DRS-4-4-1000 was a diesel-electric road switcher produced by the Baldwin Locomotive Works from July, 1948–March, 1950. The units featured a 1,000 horsepower (750 kW), six-cylinder prime mover, and were configured in a B-B wheel arrangement mounted atop a pair of two-axle AAR Type-B road trucks, with all axles powered. They had a cast steel frame. The units were configured to normally run with the long hood in the forward position.

Baldwin DRS-4-4-1000
Type and origin
Power typeDiesel-electric
BuilderBaldwin Locomotive Works
ModelDRS-4-4-10
Build dateJuly 1948 —
March 1950
Total produced22
Specifications
Configuration:
​
 • AARB-B
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Prime mover606SC
RPM range625 rpm maximum
Engine typeStraight-6 Four-stroke diesel
AspirationTurbocharger
Displacement1,979 cu in (32.43 L) per cylinder
11,874 cu in (194.58 L) total
GeneratorDC generator
Traction motorsDC traction motors
Cylinders6
Cylinder size12 3⁄4 in × 15 1⁄2 in (324 mm × 394 mm)
TransmissionElectric
Loco brakeStraight air
Train brakesAir
Performance figures
Power output1,000 hp (750 kW)
Career
LocaleNorth America

Only 9 were built for American railroads, with another 13 manufactured in January and February, 1949 by the Canadian Locomotive Company for the Esquimalt and Nanaimo Railway, the first railroad in Canada to dieselize its locomotive fleet. The DRS-4-4-1000 was (in most cases) visually indistinguishable from its 1,200 horsepower (890 kW) successor, the Baldwin RS-12. Only one intact example of the DRS-4-4-1000 is known to exist today (former CPR #8000), and is currently on display in Squamish, British Columbia.

Units produced by Baldwin Locomotive Works (1948–1950)
Railroad Quantity Road numbers
Pennsylvania Railroad
6
 5591–5594, 9276, 9277
Tennessee Central Railway
3
 75–77

Units produced by the Canadian Locomotive Company (1949)
Railroad Quantity Road numbers
Canadian Pacific Railway
13
 8000–8012 (units worked the Esquimalt and Nanaimo Railway) 8000 preserved and on display.
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References
  • "The Esquimalt and Nanaimo Railway (ENR/E&N)". ROCArchives. Archived from the original on 27 January 2006. Retrieved January 15, 2006.
  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. ISBN 978-0-89024-026-7.
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